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Cleveland HVAC Blog

Hearing Unusual Furnace Noises? Use these 3 Warning Signs to Avert Problems

Posted by Paul Wadsworth on Wed, Mar 21, 2012 @ 01:30 PM

It’s cold and dark outside, and your family has settled into their snug beds for the night when a loud, unsettling noise rumbles up from your furnace. What should you do? Is your furnace about to fail? Is it simply time for a repair? Furnace noises can mean any number of things. But whatever their cause, they shouldn’t be ignored.

Here are three kinds of sounds commonly heard from ailing furnaces—and the problems they might be indicating:

  • furnace noise maintenance by PK WadsworthDeep rumbles may be signs of dirty gas burners or a pilot light that needs to be adjusted.
  • High-pitched squealing sounds may be caused by a blower belt that’s slipping. It could also simply mean the motor or bearings need to be lubricated with oil.
  • Persistent vibrations or rattling sounds could be caused by an imbalanced blower motor or wheel.

Many furnace noises originate in the blower motor. This component works year-round, regardless of whether it's your furnace or your A/C that's running, because it’s responsible for pushing both warm and cool conditioned air through the filter and into the ductwork. Older units might have a belt and pulley system that drives the blower wheel.  If the belt gets frayed or unevenly worn, it could make rattling sounds. Poorly lubricated bearings might be causing those squealing or scraping sounds you hear. While some furnaces never require lubricating after they leave the manufacturer, some blower motors do require oil periodically.

New noises are often a sign that something has changed or a problem has developed. When you hear unusual furnace noises, no matter how insignificant they seem, call a professional. Your system may need an adjustment or repair. Often a small problem can be rectified before it snowballs into a bigger repair. Staying on top of repairs can keep your family safe from a malfunctioning furnace, and it can avert the need to replace the entire system.

The best medicine for your furnace is preventive. Regular preventive maintenance can keep your system tuned up, clean and adjusted to prolong the life span of all components, reducing the possibility of a failure that could leave you out in the cold, or in danger from combustion fumes. Call P.K. Wadsworth. We’ll be happy to help.

Photo Credit

Free Air Filter Change Reminders from PK Wadsworth

Paul WadsworthPaul Wadsworth is the President and Owner of P.K. Wadsworth Heating and Cooling. For 37 years, Paul has been providing heating and cooling services to the Greater Cleveland area. P.K. Wadsworth has been a trusted Cleveland HVAC service company for 75 years. The company understand the area's construction and local heating and air conditioning needs. Paul has an MBA from the University of Michigan and a B.S., Industrial Engineering from Purdue University. He's been President of the Cleveland Air Conditioning Contractors of America and a founding member of the local chapter. Paul was born and raised in Cleveland and has been active in the local community. He resides in Cleveland, Ohio with his wife and two sons.

The opinions and statements contained in this article are for general informational purposes only and are not instructions. Only trained, licensed and experienced personnel should attempt installation/repair. The author assumes no liability for the opinions/statements made in this article. Any individual attempting a repair or installation based on this article does so at their own risk of loss.

Topics: hvac maintenance, furnace noises, furnace maintenance, furnace repair

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